Rotary engine.



No. 805,163. PATENTED NOV. 21, 1905. N. B. SMITH.

ROTARY ENGINE.

APPLICATION FILED MAR. 20, 1905.

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, N-,R. SMITH. ROTARY ENGINE.

APPLICATION FILED MAILZQ, 1905.

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351 gluon W1 closing of the swing-arms carried by the rotary UNITEDSTATES PATENT OFFICE.

ROTARY ENGINE COMPANY, OF S TION OF WASHINGTON.

EATTLE, WASHINGTON, A CORPORA- ROTARY ENGINE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed March 20, 1905. Serial No. 251,127.

To aZZ whom it m/cty concern:

Be it known that I, NORMAN R. SMITH, a citizen of the United States ofAmerica, and a resident of the city of Seattle, in the county of Kingand State of \Vashington, have invented certain new and usefulImprovements in Ro tary Engines, of which the following is aspecification.

My invention relates to rotary engines involving certain improvementsupon the construction embodied in my application Serial No. 228,046; andthe primary object thereof is to provide means whereby the opening andpiston will be positive.

The invention further consists in so arranging the steam partsrelatively to the piston that the latter serves as an automatic cut-offtherefor, and, further, the steam, being projected against the sides ofthe piston, serves to effect a perfect balance thereof.

The above-mentioned and other desirable objects are attained by theconstructions, combinations, and arrangement of parts, as disclosed inthe accompanying drawings, set forth in the following description, andpointed out in the appended claims.

In the accompanying drawings,in which like numerals of referenceindicate like parts throughout the several views, Figure l is a sideview of my improved engine with one head of the casing removed. Fig. 2is a sectional view taken on line 2 2 of Fig. 1. Fig. 3 is a view inside-elevation of the engine. Fig. 4 is a fragmentary view in detail ofone of the abutments, and Fig. 5 is a view in perspective of one of theswing-arms. In carrying out my invention I provide a casing 1,comprising a tubular body portion formed with diametrically oppositeinternal abutments 2, the side walls of which are curved, as shown, andto this body portion opposite heads 3 are secured.

Secured to rotatable shaft 4, which projects through heads 3, is thecarrier or piston 5. This carrier is of less diameter than the bore ofthe casing, and swingingly mounted thereon and in eccentricrelation'thereto are curved swing -arms 6, preferably three, which areequally spaced apart and fitted in recesses or pockets 7 in theperiphery of the carrier. These swing-arms are formed with head portions6, which are provided in their under faces with opposite transverselydisposed steam grooves or channels 8, the same extending from the sideedges of said head portions.

Reference numeral 9 indicates pressureplates carried by the swing-arms,the same being adapted to be acted upon by the motive fluid to drive thepiston or carrier, and these pressure-plates are curved concentricallyto the axis of their respective swing-arms and fit slidably incorrespondingly curved pockets or slits, as 10, formed in the carrier.

Suitable opposite ports of egress are formed in the engine-casingintermediate the abutments 2, and these ports are connected withsuitable pipes, as 11.

Related to swing-arm 6 are opposite ports of ingress 12, which areformed in the opposite heads of the casing at opposite sides ofabutments 2 and having their inner ends arranged within the bounds ofthe carrier and lying in the path of grooves or channels 8.

The heads of the casing 1 are formed with cam tracks or grooves 13,which are engaged by rollers 14, mounted for rotation on the sides ofbearing-plates 9, and these cam-tracks are of such form as to effect theclosing of the swing-arm 6 before they reach the abutments 2 and toinsure positive opening thereof as the free ends of said arms clear theabutments, and as said arms clear the abutments the steamgrooves 8 ofthe head portions 6 register with the elongated ingress-ports, (see Fig.1,) thereby admitting steam beneath the head portions of the swing-arms,and the steam thus admitted acts in conjunction with cam-tracks 13 androllers 14 to open or swing outwardly said swing-arm, thereby tending torelieve any friction between said rollers and their camtracks, as isobvious. After the swing-arms pass the ports of ingress the latter areimmediately closed by the portions 5 of the carrier which overlie thesame, and as the swing-arms when closed overlie the ports of ingresssaid ports will be closed until the grooves 8 of the succeeding swingarms register therewith The steam when out off thus exerts pressureagainst the sides of the carrier and serves to desired, pipes 16 can beconnected to a com-.

mon feed-pipe.

In the improved engine as described 1 have provided a construction inwhich friction between parts is reduced to a minimum, and by arrangingthe swing-arms on the carrier, as described, relatively to the ports ofingress and egress no dead steam is carried between the swingarms, thesteam acting on the one swing-arm being exhausted immediately after thenext swing-arm is moved into action. The engine is therefore driven in apowerful manner with but a comparatively small consumption of steam.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States of America, is

1. A rotary engine comprising a casing formed in its heads withsteam-ingress ports, a rotary carrier in said casing, and a swingarmmounted on said carrier and being formed at its :free portion with ahead part, said head part being formed in its under face withsteamchannels extending inwardly from its side edges and adapted toregister with said ingress-ports.

2. A rotary engine comprising a casing, a rotary carrier therein, saidcasing being formed with ingress-ports arranged within the bounds of thecarrier, and a swing-arm mounted on said carrier and having its underface formed with opposite channels adapted to register with said ports.

3. A rotary engine comprising a casing, a rotary carrier therein, saidcasing being formed with ingress-ports arranged within the bounds of thecarrier, said carrier being formed in its periphery with a pocket, and aswing-armarranged in said pocket and formed with channelsadapted toreceive steam from said ingress-ports.

4. A rotary engine comprising acasing having an ingress-port, a carrierrotatable therein, a swing-arm mounted on said carrier and being formedin its under face with a steamchannel, and means connected to said armactuated from a cam-track in a casing for opening and closing saidswing-arm, said swingarm starting to open when its groove registers withsaid ingress-port.

5. A rotary engine comprising a casing having opposite internalabutments and opposite ingress-ports on one side of each abutment, arotary carrier formed with a pocket, a swingarm mounted in said pocketand being formed with opposite channels extending inwardly from itsside, said channels simultaneously registering with said ingress-portsas the carrier is rotated.

6. A rotary engine comprising a casing, a rotary carrier mountedtherein, and a swingarm mounted on said carrier and having its underface formed with asteam-channel, said casing being formed with aningress-port arranged in the path of travel of the groove of saidswing-arm, said ingress-port being normally closed by said carrier,substantially as and for the purpose specified.

7. A rotary engine comprising a casing, a rotary carrier mountedtherein, said casing being provided in its opposite sides withingress-ports arranged within the bounds of the carrier whereby thesteam exerts pressure on the opposite sides of the carrier, and aswingarm mounted on said carrier and being acted upon by the steam fromsaid ingress-ports.

8. A rotary engine comprising a casing, a rotary carrier therein, saidcasing being formed with ingress-ports and camtracks,and means connectedto said swing-arm and being operated by said cam-tracks for opening andclosing said swing-arm, said ingress-ports being arranged to dischargesteam under said swing-arm when the same is being opened by saidcam-track.

9. A rotary engine comprising a casing,hav ing opposite internalabutments and being formed in its sides with ingress-ports arranged atone side of said abutments, and having egress-ports intermediate saidingressports, a carrier rotatably mounted in said casing and beingformed in its periphery with pockets, swing-arms mounted in said pocketsand being formed with steam-channels adapted to register with saidingress-ports, bearing-plates secured to said swing-arm and extendinginto the carrier, and rollers on the sides of said bearing-plates, saidcasing being formed with cam-tracks in which said rollers are received.

Signed at Seattle, Washington, this 14th day of March, 1905.

NORMAN R. SMITH.

Witnesses:

OTIS W. BRINKER, O. B. SUPPIGER.

